W00t! It's time for another collaboration with the always-excellent What Is It? blog. Can you guess what this strange object is?

Put your guess in the comment section below (click the +). One guess per comment, though you can enter as many guesses as you'd like. Please do not post any web link or URL - doing so will void your entry. You have until the answer is revealed on the What Is It? Blog tomorrow.

Two prizes: the first correct guess and the funniest yet wrong one will win a T-Shirt from the NeatoShop.

IMPORTANT: Please write your prize selection alongside your guess, so visit the NeatoShop and take a look around. If you don't write your prize selection, then you don't get the prize. I think you'll like the selection of funny t-shirts and science t-shirts -or even t-shirts of your favorite blogs and websites.

Update: the pictured object is a homemade hammer. Berhard was first in with the correct answer, and wins a t-shirt! The funniest answer came from Algomeysa, who said, "If you're feeling left out because the Russian meteor didn't break your windows, you can alleviate the problem with this!" That deserves a t-shirt from the NeatoShop! See the answers to all this week's mystery items at the What Is It? blog.